Features:‧Advanced Main Battle Rifle (AMBR)‧Full metal version 2 gearbox‧Comes with polymer upper body with 20mm top rail for optics‧Comes with polymer lower body with 20mm front end short rail for accessories‧Comes with polymer 20mm side rails on upper body for accessories‧Comes with metal folding front and rear iron sight‧Comes with metal 14mm CCW threaded outer barrel with flash hider‧Comes with polymer basic head cap‧Comes with polymer military handguard with 20mm rail for accessories & "S.T.A.R. XR-5T" marking‧Comes with polymer 6-positions military stock with cheek rest‧Comes with polymer ergonomics grip‧Comes with metal trigger, magazine release, fire mode selector and dust cover‧Comes with polymer housing 225 rounds hi-cap magazine‧Magazines are compatible with M4/M16 type magazines‧Huge space inside the handguard that fits most types of batteries‧Push the short rail on lower body then flip down the handguard to install batteries